// multi-utility computation suite · offline · instant · precise
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sci.grain-size-sediment Calculator
Calculates sediment grain size distribution statistics (D₁₀, D₅₀, D₉₀) from sieve or laser diffraction data and classifies sediment using the Wentworth scale. Uniformity coefficient Cu = D₆₀/D₁₀ < 4 = poorly graded (uniform); > 6 = well graded — well-graded soils compact to higher density and have lower permeability.
Inputs
D Mm
Distance across a circle through its centre. Always confirm units match the rest of the calculation.
Fluid Viscosity Mpas
Fluid resistance to flow. Water at 20°C: ~1 cP. Honey: 2,000–10,000 cP. Higher viscosity increases pumping power requirements.
Particle Density Kg M3
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
Fluid Density Kg M3
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.